Open AccessControlling plasmon-induced transparency of graphene metamolecules with external magnetic field
Author(s) -
Jian Qiang Liu,
Yu Zhou,
Li Li,
Pan Wang,
Anatoly V. Zayats
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.012524
Subject(s) - graphene , faraday effect , plasmon , magnetic field , optics , materials science , polarization (electrochemistry) , wavelength , magneto optic effect , optoelectronics , faraday rotator , physics , nanotechnology , chemistry , quantum mechanics
We numerically demonstrate dynamically tuneable plasmon-induced transparency in a π-shaped metamolecules made of graphene nanostrips by applying external static magnetic field. It is shown that for graphene nanostrips with appropriate Fermi energy, the resonant wavelength, line-shape, and the polarization of transmitted light in the mid-infrared can be effectively controlled by magnetic field. In particular, giant polarization rotation exceeding 20° has been observed in asymmetric graphene metamolecules, which is further enhanced to almost 40° due the Faraday effect in the applied magnetic field, at around 9 μm wavelength, much higher frequency than the Faraday rotation observed in a semi-infinite graphene microribbons. The results offer a flexible approach for the development of compact, tunable graphene-based photonic devices.